Will this work on a 1990 70hp evinrude? I see no key switch or a place to plug in my wiring harness?

A:

It is a universal control unit for all single-station outboards and sterndrives with mechanical transmissions. It does not work with OEM cables though and you will need the 3300/33C cables for these to work. This has no key switch. For more info call us at the number at the top of the page.

This is a universal control that will work with most outboard/sterndrive engines and replaced side mount single controls. It isn't specifically for the boat you have listed, but should work with it, along with various boats of that nature.